N-heterocyclic carbomethoxylation catalyzed by ionic liquids in the presence of dimethyl carbonate

被引：37
|
作者：
Fu, Xianlei [1 ]
Zhang, Zhan [1 ]
Li, Caimeng [1 ]
Wang, Libing [1 ]
Ji, Haiying [1 ]
Yang, Yu [1 ]
Zou, Ting [1 ]
Gao, Guohua [1 ]
机构：
[1] E China Normal Univ, Dept Chem, Shanghai Key Lab Green Chem & Chem Proc, Shanghai 200062, Peoples R China
来源：
CATALYSIS COMMUNICATIONS | 2009年 / 10卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Dimethyl carbonate; Ionic liquid; Carbamates; Mechanism; NUCLEOPHILIC CATALYSIS; ALIPHATIC-AMINES; CARBOXYLIC-ACIDS; AROMATIC-AMINES; EFFICIENT; ESTERIFICATION; METHYLATION; NITROGEN; METHANOL; ACCESS;
D O I：
10.1016/j.catcom.2008.11.012
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A procedure for the synthesis of N-heterocyclic carbamates from N-heterocycles and dimethyl carbonate catalyzed by ionic liquids was investigated. [Bmim]OH was found to be the most active catalyst among the applied ionic liquids. Effects of the amount of ionic liquid, reaction temperature and the reusability of ionic liquid were also investigated. Ninety six percentage yield and 100% selectivity were obtained under the optimal conditions when using indole as a reactant. Additionally, [Bmim]OH can be reused at least up to four times without any decrease of activity. The possible reaction mechanism was discussed based on the reaction results. (c) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：665 / 668
页数：4
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